DIY Pick and Place V2 – Base Vision LED Array
The PCBs arrived today for the LED array to go in the base of the Pick and Place system. The six boards hold a total of 144 red LEDs.
We are now trying to use OpenCV with the Emgu CV C# wrapper to detect the chips.
The driver board is based on the LM3404MA constant current driver from Texas Instruments with a 24V input to drive the led array and also has a dimming input so the brightness can be controlled via a PWM input. The driver was designed using TIs Webench, you can download the schematic for the driver here.
When the LEDs are turned on, they produce a very smooth and even light on the components held in the picker head which will hopefully allow easier detection for the camera and software.